IH POWER
ALL MOTOR!
What should I 6.9 idle at? Mine idles at 500rpm. What does some of you guys' idle at?
6.9 idle question
- Thread starter IH POWER
- Start date
Wyreth
Certifiable Noob
Mine idles at 625, but it's not overly happy there. IIRC it's susposta be set at 675.
justinray
Contributor
Mine was 500, the adjustment is easy, set it at 650 and you'll be happier. Especially with a manual tranny.
jaluhn83
Full Access Member
How are you getting the rpm? The stock tach is not reliable, especially at low rpms. I've seen many that read 300-500 rpm at idle and then are accurate over about 800 rpm.
Also, IIRC, idle speed is set internally in the pump. The stop screw on the pump lever is not supposed to be an idle adjust, it's the lower stop for the arm travel. Remember that the throttle arm doesn't directly control fuel injected, rather is loads a spring that connects to the fuel controls along with the governor.
Also, IIRC, idle speed is set internally in the pump. The stop screw on the pump lever is not supposed to be an idle adjust, it's the lower stop for the arm travel. Remember that the throttle arm doesn't directly control fuel injected, rather is loads a spring that connects to the fuel controls along with the governor.
Keeway
ALL MOTOR!
i wouldnt know my truck doesnt even have a tach lol
The internal idle screw is to take up any slack in the idle spring at assembly. The external idle (stop) screw is used to set the idle RPM. If you still have the label on a valve cover it will indicate what the idle RPM should be set at, usually at 650 RPM.
Attachments
Last edited by a moderator:
jaluhn83
Full Access Member
Okay, guess I was wrong..... Thanks
Hydro-idi
Full Access Member
Hell I just took a peak at my IP because mine idles around 900rpm and it doesn't even have the idle screw hahaha. Oh well guess that means no tinkering for today
IH POWER
ALL MOTOR!
So if I adjust that screw on the IP it'll adjust my idle?
IH POWER
ALL MOTOR!
And for the record I don't think my cold idle thing or whatever you guys were talking about is working haha. Or my glow plugs either. Because on a warm day (80 degrees) when I start the truck, it'll lope like its cold for a few seconds. Then i'll give it a little throttle and it'll smooth out once its warm. I know the glow plugs stay on after the truck is started to warm the fuel so that must mean I have no glow plug power.
IH POWER
ALL MOTOR!
So I just went out and turned that screw to the right and got my idle set at 650. Seems to have a touchier gas pedal now and it seems to have fixed my low oil pressure gauge!! Oil pressure used to drop off the table at idle but now it sits right in the middle of L and H. 
